Gholamali C. Shoja

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This paper presents a heuristic to solve the Multidimensional Multiple-choice Knapsack Problem (MMKP), a variant of the classical 0–1 Knapsack Problem. We apply a transformation technique to map the multidimensional resource consumption to single dimension. Convex hulls are constructed to reduce the search space to find the near-optimal solution of the(More)
Experimentally measured contact traces, such as those obtained in a conference setting by using short range wireless sensors, are usually limited with respect to the practical number of sensors that can be deployed as well as available human volunteers. Moreover, most previous experiments in this field are partial since not everyone participating in the(More)
Efficient routing in mobile opportunistic networks and Delay Tolerant Networks (DTNs) in particular, is a challenging task because human mobility patterns are hard to predict. Several recent work have shown the importance of communities in efficient routing of messages in DTNs. However, real time community detection in DTNs is a complex and time consuming(More)
Content Distribution Networks (CDNs) have been developed and evolved to meet the growing commercial need for efficient and secure delivery of content over the Internet. Several proprietary CDN systems are now operating successfully, fulfilling the commercial demands to a certain extent. The protocols and algorithms used in these systems are mostly of(More)